{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "VEGF / VPF and FVIIIRAg immunohistochemistry and endothelial specific lectin ( UEA1 ) binding studies , indicate that the elevation of VEGF protein expression initially occurred in both blood vessels and non - endothelial cells ."}
{"Disease": [], "Chemical": []}